Problem Set 1

Chem 220

Due : Monday, September, 14, 1998

 

1) Draw Lewis structures for C2H6, C2H4, HOCH2CH2CHO and CH3CH2CN

2) Draw Lewis structures for all the isomers of C3H9N.

3) Provide an example of a neutral and negatively charged resonance structure.

4) A compound has a pKa = 4.76. What is the value of Ka? In what form will this compound

exist in aqueous NaOH?

5) Is KNH2 more stable in n-pentane or water? Explain.

6) Acrylonitrile, CH2=CHCN (1), is used in the formation of polymers. Draw an orbital picture

of 1 and label the types of bonds and the hybridization of the carbon atoms.

7) Which of the following molecules have net dipole moments? Explain briefly.

8) Locate and name the functional groups in the molecules shown below.